geiffin



(No Model.) 2 Sheets-Sheet 1.

E. c. GRIFFIN. PULVERIZING MILL.

No. 410,758. Patented Sept. 10, 1889.

will! (NoModeL) E. C. GRIFFIN. PULVERIZING MILL.

2 Sheets-Sheet 2.

No.- 410,758. Patented Sept. 10, 1889.

'JINIIIII UNITED STATES PATENT OFFICE.

EDlVlN C. GRIFFIN, OF BROOKLYN, ASSIGNOR TO THE GRIFFIN MANU- FACTURING COMPANY, OF NEWV YORK, N. Y.

PULVERIZING-MILL.

SPECIFICATION forming part of Letters Patent No. 410,758, dated September 10, 1889.

Application filed July 17, 1888- Serial No. 280,158. (No model.)

To all whom it may concern:

Be it known that I, EDWIN OoLvER GRIF- FIN, a citizen of the Dominion of Canada, re-

to revolve against the inner wall of an annu lar die or ring, said roller or rollers, when in operation, being forced against said die or ring by centrifugal force; and it consists in the improved construction and arrangement or combination of parts, hereinafter fully disclosed in the description, drawings, and claims.

The objects'of my invention are, first, to provide a mill or pulverizer of the character named, with elastic or spring connections between the rollers or their spindles and the re-' volving center or driver to which they are attaohed, whereby the strain upon'said spi'n-' dles and their connections and the wear upon the same and their bearings will be less se- Vere than usual; second, to provide roller-i supports which are soconstructed and at-i tached to the revolving center or driver as to, permit the rollers to have freedom of move-; ment in all directions; third, to provide saidrevolving center or driver with brackets,

which maybe either integral with or attached thereto, and which are formed with sockets arranged parallel with the axis thereof;

fourth, to form the roller-supports with journal-spindles and pivotal spindles, the latter being loosely fitted in the sockets of said brackets and the former serving as journals upon which the rollers revolve; fifth, to form said roller-supports with journal-spindles and pivotal spindles and with spring-coils arranged intermediate of said spindles and adapted to move universally or like ball-and socket joints, and, sixth, to provide improved means for lubricating the rollers and journal spindles and for preventing the access thereto of dirt and water. plish by the mechanism illustrated in the accompanying drawings; forming part of this specification, in which the same referencenumerals indicate the same parts.

Figure 1 represents a top plan view of a sufficient portion of my improved mill-or pulverizer to illustrate my invention; Fig. 2, a Vertical part section of the same, the ring or annular die being Omitted; Fig. 3, another top plan View of a portion of a mill or pulverizer provided with a modified construction of my improvement; Fig. 4, a vertical part section of the same .on the line a: so of Fig. 3, and Fig. 5 a sectional detail view of a modified form of spring for the improvementillustrated in Figs. 3 and at.

In the drawings, the numeral 1 indicates the annular die or ring, which is made of steel and supported in the casing of the machine in the usual or any suitable-manner.

2 indicates-the central vertical drive-shaft, upon which is mounted and rigidly secured the revolving center or, driver 3, which is provided with equidistant arms 4, having castings or brackets 5, which may be formed integral therewith or attached thereto and formed with vertical sockets 5. Projecting at right angles from the lower portions of these castings or brackets are extensions 6, which are formed or provided with supports 7, upon which the rollers rest when not in operation.

, The crushing or pulverizing rollers S are preferably cylindrical in form, but they may be of other shape, according to the desired configuration or angle of the inner wall of these necks and securely fastened to the j ournal-spindles of the rollers are hoods 11,whic11 form shoulders against which. the rollers work These objects I accomwhen in operation and steady the same, and also they serve to protect the spindles and journal-bearings from dirt and water. The rollers are mounted with their axial bores 9 upon the downwardlyprojecting journalspindles 12 of the roller-supports 13, which are formed at their inner ends with similar downwardly-projecting pivotal spindles 14, which are journaled in the sockets 5 in the brackets 5 of the revolving center or driver The journal-spindles 12 are each formed with an axial channel 15, which is enlarged at its lower end to form a chamber 16, and with a lateral duct 17 at its upper end, which extends out through the circumference of the spindle and connects with a metal tube 18, which is secured in an opening in the hood 11. To this tube is removably attached an elastic pipe 19, which leads outside of the shell or casing and is adapted to receive a lubricant and properly deliver the same through the channel 15 into the chamber 16, for lubricating the bore of the roller, the journal-spindle, and the lining or bushing; or, if preferred, the elastic pipe 19 may be omitted or removed and the lubricant supplied directly through the tube 18 from an oil can or reservoir attached to the hood 11 or other suitable support.

The roller-supports 13 are preferably made of rods of spring steel, which are bent along their middle portions into coils 20, their ends being formed, respectively, into the jourpal and pivotal spindles 12 and 1%. This is the preferred form of my invention, and is illustrated in Figs. 1 and 2 of the drawings; but it is evident, however, that modifications may be made in the construction and arrangement of the parts thereof without departing from the principle of my invention, as will be observed on reference to the other ligu res of the d 'awings and the description of the modification therein shown.

\Vhen the center or driver is revolved in the direction of the arrow shown in Fig. 1 of the drawings, the rollers will be swung outward by centrifugal force against the inner wall of the annular die and crush or pulverize whatever material may be fed between them; also, while the pivotal spindles of the roller-supports will be firmly held in proper position in the socketed brackets,the journalspindles, by permission of the spring-coils, will be free to move or yield in all directions and admit of the rollers assuming varying positions with respect to the innerface of the ring or die, thereby not only causing proper operation of said rollers in crushing or grindin g, but preventing the breakage of said rollersupport-s or the spindles, the rollers, the socketed brackets, or the arms of the revolving center or driver, in the event of the rollers coming into contact with any foreign or irreducible substance. The coil-springs are not employed for the mere purpose of forcing the rolleis against the annular die or ring, as the centrifugal force of the rollers, as they are thrown outwardly by the revolving center or driver, is sullicient for this purpose; but they serve to cushion said rollers to prevent all jarring of the working parts of the machine and consequent breakage, to prevent uneven wear upon the main or drive shaft and the journal and pivotal spindles, and also to pro vide a universally movable or flexible connection between said spindles which will admit of the same and the rollers assuming various angles with respect to each other, and this without causing uneven wear upon the bushings of the rollers, the spindles, or the sockets of the brackets upon the revolving center or driver. During the operation of the rollers, or while they are moved around by the revolving center or driver, they will rise slightly upward upon their join'nal-spindles, from the fact that the lower ends of said spindles are slightly in advance of their upper ends, and when said center or driver and rollers are not in operation the latter will. descend and rest upon the supports 7 of the horizontal extensions 6 of the brackets 5.

In the modified construction of my improvement, as illustrated in Figs. 3, 4, and 5 of the drawings, the rollers 8, sockets 5, brackets 5, extensions 6, and supports 7 are substantially the same as those already described; but the roller-supports 13 are differently constructed, as will appear from the following: The horizontal rods 21, to the outer ends of which the journal-spindles 12 and the hoods 11 are firmly secured, extend loosely through eyes 22, formed upon the upper ends of the pivotal spindles 14-, which are tightly secured in the sockets 5'. Mounted upon the inner and outer ends of these rods are concaved washers 23, which are respectively held in place by being forced against the hoods 11 at their outer ends and against nuts 21- at their inner ends by the spring-coils 20, which are securely confined between said washers and the coneaved sides of the eyes 22. The tension of these spring-coils is adjusted or regulated by means of the nuts 24 upon the outer ends of the rods 21; also by means of these nuts and the intermediate connections the journalspindles and the rollers can either be fixed in perpendicular position or inclined in either direction, as may be necessary or desired.

Secured to and projecting outwardly from the revolving center or driver are the arms 26, which are arranged in ahigher plane than the rods 21 and provided with eoncaved eyes 27 upon their outer ends, through whiehprojee't the j ournal-spiiulles 12 of the rollers. (Joncaved washers 28 are rigidly secured upon these spindles below said eves, and similar washers 29 are mova-bly secured abovesaid eyes by means of nuts 30 upon the upper ends of said spindles; also spring-coils 20 are confined between said washers and eyes and are capable of havingtheir tension regulated by adjusting the upper washers and nuts; also, by means of these upper nuts the journalspindles and the rollers can be vertically adjusted. In place of' these coils truncated conical rubber springs, of the form illustrated in Fig. 5 of the drawings, may'be used. It will be obvious from the foregoing that this modified construction of the roller-supports will permit of the same general play or universal movement of the rollers that is incident to the first-described form of said rollersupports, the spring-connection of the journal-spindles and their rollers with the revolving center or driver permitting the same movement of said rollers in both forms of the invention.

An advantage is incident to these constructions of roller-supports which is not possessed by mills or pulverizers of this class in which the roller-spindles are suspended from their upper ends. With my roller-supports the rollers will at all times present their peripheries parallel to the inner wall of the ring or die, this being due to their capability of movement to and from said die in the plane of their revolution, whereby they crush or grind evenly along their entire lengths, whereas in some mills or pulverizers in which the rollerspindles are suspended from their upper ends the lower ends of the rollers are swung farther outward than their upperends, forming increasing angles with the inner wall,of the ring or die, and thereby will crush or grind more finely with their lower than with their upper portions.

I 'am aware that it is not new in this class of mills or pulverizers to hold spindles and their rollers against dies by springs, so as to secure a yielding pressure; but I am not aware that a roller-support.provided with a.

universally springy or yielding journal-spindle has been attached to arevolving center or driver for the purpose of securing an elastic connection between the latter and the roller and its spindle, so that the strain upon said spindle may be lessened and the wear upon the same and the bushing of the roller reduced.

Under the construction of the invent-ion as shown in Figs. 3 and 4 of the drawings it is possible to so adjust the journal-spindle with respect to the revolving center or driver as to hold the roller away from the die for a distance about sufficient to counteract the amount of centrifugal force that will be developed in the journal-spindle and its connections when in action, and thus said roller, its spindle and bushing will be relieved from the detrimental action or wear that is incident to such force.

or pulverizer is principally intended for pulverizing ores and similar materials, but it is obvious that the same may be employed for crushing or grinding other substances.

The usual inclines for elevating the ma-.

terial, and also any suitable feeding, distributing, and discharging mechanism may be employed in connection with the improvements herein shown and described hence they require no illustration or description herein.

Having thus fully described the construction and arrangement or combination of parts of my improved mill or pulverizer, its operation and advantages, what I claim as new, is-

1. In a pulverizer, the combination, with an annular die and a revolving center or driver, of a roller-support secured to said revolving center or driver and provided with a universally-yielding journal-spindle, and a roller mounted upon said spindle,substantially as described.

2. In a pulverizer, the combination, with an annular die and a revolving center or driver, of a roller-support provided with a universally-yielding journal-spindle, and also with a pivotal spindle arranged parallel to the axis of said revolving center or driver, the pivotal spindle being pivoted to said center or driver an d the j ournal-spindle having a roller mounted thereon, substantially as described.

3. In apul-verizer, the combination, with an annular die and a vertical revolving center or driver provided with brackets having vertical sockets formed therein, of roller-supports provided with vertically-arranged spindles at their inner and outer ends, the inner spindles being mounted in said sockets and the outer spindles provided with rollers and means for permitting a universal yield of said outer spindles, substantially as described.

a. In a pulverizer, the combination, with the annular die 1, the drive-shaft 2, the revolving center 3, the brackets 5, formed with vertical sockets 5' and extensions 6,havii1g the supports 7, of the roller-supports 13, provided with the universally-yielding springs 20, and with the pivotal spindles 14' and journal-spindles 12, and the rollers 8, which are formed with the central bores 9, closed at the lower ends, and which are mounted upon said journal-spindles, substantially as described.

5. In a pulverizer, the combination of the annular die 1, the revolving center or driver 3, provided with the brackets 5, having the sockets 5 and supports 7, the roller-supports 13, provided with the pivotal spindles 14., which are mounted in said sockets, and with the universally-yielding journal-spindles 12, provided with the hoods 14, and the rollers S, mounted upon said journal spindles and formed with the conical n ecks 10, substantially as described.

6. In a pulverizer, a roller-support provided with a pivotal spindle, a journal-spindle, and intermediate spring-coils substantially as described.

7; In a pulverizcr, the combination of an annular die 1, a revolving center or driver 3, provided with vertical sockets 5, roller-supports 13, provided with spring-coils 20, pivotal spindles 1% and journal-spindles 12, said pivotal spindles being mounted. in said sockets, and rollers 8, mounted upon said journalspindles, substantially as described.

In a pulverizer, the combination of the annular die 1, the revolving center or driver 3, provided with the brackets 5, having the vertical sockets 5 and the supports '7, the roller-supports 13, provided with the springcoils 20, the pivotal spindles 1i and the journal-spindles 12,,and the rollers 8, having the central bores 9, closed at the lower ends and mounted upon said journal-spindles, sub stantially as described.

9. In a pulverizer, the combination of the annular die 1, the revolvin g center or driver 3, provided with the brackets 5, having sockets 5 and supports 7, the roller-supports 13, formed with the spring-coils 20, the pivotal spindles 14, mounted in said sockets, and the journal-spindles 12, provided with the hoods 14, and the rollers S, mounted upon said journal-spindles and formed with the conical necks 10 at their upper ends and with closed lower ends, substantially as described.

10. In a pulverizer, the combination of the roller-support 13, provided with the journalspindle 12, which is formed with the axial channel 15, the enlarged chamber 16, and the lateral duct 17, the apertured hood 11, the metal pipe 18, the flexible pipe 1.), and the roller 8, formed with a cent *al closed bore 9 and a conical neck 10, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

EDWIN C. GRIFFIN. \Vitnesses:

.T. K. GRIFFIN, E. E. GRIFFIN. 

